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From: "vincent-gcc at vinc17 dot net" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/105499] inconsistency between -Werror=c++-compat and g++ in __extension__ block Date: Mon, 31 Oct 2022 14:17:56 +0000 [thread overview] Message-ID: <bug-105499-4-0AW2w3JmjU@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-105499-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105499 --- Comment #6 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> --- To be clear... I'm not sure about what kind of compatibility warnings one can get, but it is OK to silence valid extensions, i.e. those that will not give an error. But invalid extensions, i.e. those that would give an error with a compat-implied compiler (like in the testcase), should not be silenced by __extension__. The problem is that in my original testcase, __extension__ was used in order to silence the warning for the ({...}) construct, which is still valid with g++. But as a side effect, it also silences the conversion from the "int *p = q;", which is invalid in C++ (and is actually *not* an extension as it fails as shown in my bug report).
next prev parent reply other threads:[~2022-10-31 14:18 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-05-06 0:12 [Bug c++/105499] New: " vincent-gcc at vinc17 dot net 2022-05-06 4:09 ` [Bug c++/105499] " egallager at gcc dot gnu.org 2022-05-06 9:17 ` vincent-gcc at vinc17 dot net 2022-10-31 7:45 ` [Bug c/105499] " pinskia at gcc dot gnu.org 2022-10-31 7:53 ` pinskia at gcc dot gnu.org 2022-10-31 12:34 ` vincent-gcc at vinc17 dot net 2022-10-31 14:17 ` vincent-gcc at vinc17 dot net [this message] 2022-10-31 14:57 ` pinskia at gcc dot gnu.org 2022-11-01 3:21 ` vincent-gcc at vinc17 dot net
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